The following comments are not to belittle JohnM's 'research'...I agree the discrepancies need to be resolved.
That being said, I thought the variance/looseness in language has long been common knowledge...I think it was even mentioned in the videoed of the board meeting.
We have lived with the discontinuity for decades, why does it now need to be fixed before we do anything?
There is no official Olmsted planting plan.
There is no official Olmsted decree of "only these plants".
Our NHL status is not in jeopardy because of this discontinuity, nor from planting cultivars.
This is much ado about nothing and we will spin our wheels (for a long time) trying to agree upon hard rules that only a small portion of people will likely be happy with.
I believe we need to stay away from extremes...for instance, don't plant Japanese maples all over the village...and don't require everything planted to be grown from the seed of trees within our micro-culture...and don't wait until everything is agreed upon before we do anything.
We have lost the majority of our high canopy that made the village feel the way Olmsted intended. I'm not pretending to channel Olmsted here...Elms and the feel of the canopy was a part of the design principles.
We can either abandon that or try to restore it with the options that are available to us.
/